- 1(current)
Q. No.Given below are two statements:
| Assertion (A): | Radio waves can be polarised. |
| Reason (R): | Sound waves in the air are longitudinal in nature. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Polarization of Light |
 75%
Level 2: 60%+
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A linearly polarized monochromatic light of intensity \(10\) lumen is incident on a polarizer. The angle between the direction of polarization of the light and that of the polarizer such that the intensity of output light is \(2.5\) lumen is:
| 1. | \(60^\circ\) | 2. | \(75^\circ\) |
| 3. | \(30^\circ\) | 4. | \(45^\circ\) |
Subtopic: Â Polarization of Light |
 69%
Level 2: 60%+
NEET - 2022
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After passing through a polarizer, a linearly polarized light of intensity \(I\) is incident on an analyser making an angle of \(30^\circ\) with the axes of the polariser. The intensity of light emitted from the analyser will be:
| 1. | \(\dfrac{I}{2}\) | 2. | \(\dfrac{I}{3}\) |
| 3. | \(\dfrac{3I}{4}\) | 4. | \(\dfrac{2I}{3}\) |
Subtopic: Â Polarization of Light |
 83%
Level 1: 80%+
NEET - 2022
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Unpolarized light of intensity \(I_0\) is incident on a polariser \(A\) and subsequently on polariser \(B\) whose pass axis is perpendicular to that of \(A\). Now a polariser \(C\) is introduced between \(A\) and \(B\) such that pass axis of \(C\) is at \(45^{\circ}\) with the pass axis of \(A\). The intensity of light that comes out of \(B\) is:
1. \(\dfrac{I_0}{8}\)
2. \(\dfrac{I_0}{4}\)
3. \(0\)
4. \(\dfrac{3I_0}{8}\)
1. \(\dfrac{I_0}{8}\)
2. \(\dfrac{I_0}{4}\)
3. \(0\)
4. \(\dfrac{3I_0}{8}\)
Subtopic: Â Polarization of Light |
 68%
Level 2: 60%+
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An unpolarised light beam of intensity \(2I_0\) is passed through a polaroid \(P\) and then through another polaroid \(Q\) which is oriented in such a way that its passing axis makes an angle of \(30^{\circ}\) relative to that of \(P\). The intensity of the emergent light is:
1. \(\dfrac{I_0}{4} \)
2. \(\dfrac{I_0}{2} \)
3. \(\dfrac{3 I_0}{4} \)
4. \(\dfrac{3 I_0}{2}\)
1. \(\dfrac{I_0}{4} \)
2. \(\dfrac{I_0}{2} \)
3. \(\dfrac{3 I_0}{4} \)
4. \(\dfrac{3 I_0}{2}\)
Subtopic: Â Polarization of Light |
 80%
Level 1: 80%+
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The expression for intensity (as shown in the figure) of transmitted light when a polaroid sheet is rotated between two crossed polaroids is:
[Given: \(I_0\) is the intensity of transmitted light from polariser \(\mathrm{A}\)]
| 1. | \(I = \dfrac{I_{0}}{2} \sin^{2} 2 \theta\) | 2. | \(I = \dfrac{I_{0}}{4} \sin^{2} 2 \theta\) |
| 3. | \(I = \dfrac{I_{0}}{2} \cos^{2} 2 \theta\) | 4. | \(I = \dfrac{I_{0}}{4} \cos^{2} 2 \theta\) |
Subtopic: Â Polarization of Light |
 55%
Level 3: 35%-60%
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A beam of unpolarised light of intensity \(I_0\) is passed through a polaroid \(A,\) through another polaroid \(B,\) oriented at \(60^\circ\) and finally through another polaroid \(C,\) oriented at \(45^\circ\) relative to \(B\) as shown in the figure. The intensity of the emergent light is:
1. \(\dfrac{{I}_0}{16}\)
2. \(\dfrac{{I}_0}4\)
3. \(\dfrac{{I}_0}2\)
4. \(\dfrac{{I}_0}{32}\)
1. \(\dfrac{{I}_0}{16}\)
2. \(\dfrac{{I}_0}4\)
3. \(\dfrac{{I}_0}2\)
4. \(\dfrac{{I}_0}{32}\)
Subtopic: Â Polarization of Light |
 77%
Level 2: 60%+
NEET - 2024
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Two Nicols prisms (polariser and analyser) are oriented in such a way that the maximum amount of light is transmitted. Now, if the analyser is rotated by an angle of \(45^\circ\), what fraction of the maximum intensity of the light will be reduced?
| 1. | \(25\%\) | 2. | \(75\%\) |
| 3. | \(50\%\) | 4. | \(30\%\) |
Subtopic: Â Polarization of Light |
 61%
Level 2: 60%+
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An unpolarised light beam strikes a glass surface at Brewster's angle. Then:
| 1. | The refracted light will be completely polarised. |
| 2. | Both the reflected and refracted light will be completely polarised. |
| 3. | The reflected light will be completely polarised but the refracted light will be partially polarised. |
| 4. | The reflected light will be partially polarised. |
Subtopic: Â Polarization of Light |
 69%
Level 2: 60%+
NEET - 2024
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- 1(current)
Q. No.
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